/******************************************************* 
FORMS 
All code by Ryan Parman, unless otherwise noted. 
(c) 1997-2003, Ryan Parman 
http://www.skyzyx.com 
Distributed according to SkyGPL 2.1, http://www.skyzyx.com/license/ 
*******************************************************/ 


/******************************************************* 
ALLOW ONLY ONE SUBMISSION OF THE FORM 
Attach an onload to the form tag.  Can use this.name. 
*******************************************************/ 
function submitOnce(formName) 
{ 
    this.formName=(formName) ? formName:0; 

    if (document.forms && document.getElementsByTagName) 
    { 
        var subFields=eval('document.forms["'+this.formName+'"].getElementsByTagName("input");'); 

        var subFieldsLen=subFields.length; 
        for (k=0; k<subFieldsLen; k++) 
        { 
            if (subFields[k].getAttribute("type").toLowerCase() == "submit") subFields[k].disabled=true; 
            if (subFields[k].getAttribute("type").toLowerCase() == "reset") subFields[k].disabled=true; 
        } 
    } 
} 




/******************************************************* 
SELECT ALL (HIGHLIGHT FIELD) 
*******************************************************/ 
function selectAll(formField) 
{ 
    temp=eval(formField); 
    temp.focus(); 
    temp.select(); 
} 




/******************************************************* 
SINGLE-SELECT CHECKBOXES 
This gives checkboxes the "one-at-a-time" functionality of radio buttons. 
*******************************************************/ 
function radioButton(formName) 
{ 
    this.formName=(formName) ? formName:0; 
     
    this.select=function(what) 
    { 
        if (document.forms && document.getElementsByTagName) 
        { 
            var raFields=eval('document.forms["'+this.formName+'"].getElementsByTagName("input");'); 

            var raFieldsLen=raFields.length; 
            for (i=0; i<raFieldsLen; i++) 
            { 
                if (raFields[i].getAttribute("type").toLowerCase() == "checkbox") raFields[i].checked=false; 
                what.checked=true; 
            } 
        } 
    } 
} 



/******************************************************* 
CHECKBOXES 
By Ryan Parman 
- Click and Drag functionality by Peter Bailey, http://www.peterbailey.net 
- Must be initialized as an object, then (optionally) attach an onload to the BODY tag, 
      either objName.enableMouseover(), or objName.enableClickDrag(), but not both. 
- Use objName.check(), objName.clear(), or objName.toggle(). 
*******************************************************/ 
function checkbox(nameOfForm) 
{
    // Store variables. 
    this.nameOfForm=(nameOfForm) ? nameOfForm:0; 
    this.toggleOnOff=1; 

    // Can be used externally, but meant for internal use only. 
    this.set=function(bool) 
    { 
        if (document.forms && document.getElementsByTagName) 
        {
            var theFields=eval('document.forms["'+this.nameOfForm+'"].getElementsByTagName("input");'); 

            var theFieldsLen=theFields.length;
            for (i=0; i<theFieldsLen; i++) 
            { 
                if (theFields[i].getAttribute("type").toLowerCase() == "checkbox") theFields[i].checked=bool; 
            } 
        } 
        else alert('Not Supported'); 
    } 

    // Basic functions to use externally. 
    this.check=function() { this.set(true); } 
    this.clear=function() { this.set(false); } 

    // Just a nifty little feature. 
    this.toggle=function() 
    { 
        if (this.toggleOnOff) { this.set(true); this.toggleOnOff=0; } 
        else if (!this.toggleOnOff) { this.set(false); this.toggleOnOff=1; } 
    } 

    // Call this during BODY onLoad to add mouseover functionality to the form. 
    this.enableMouseover=function() 
    { 
        if (document.forms && document.getElementsByTagName) 
        { 
            var moFields=eval('document.forms["'+this.nameOfForm+'"].getElementsByTagName("input");'); 

            var moFieldsLen=moFields.length; 
            for (i=0; i<moFieldsLen; i++) 
            { 
                if (moFields[i].getAttribute("type").toLowerCase() == "checkbox") 
                { 
                    onMO=moFields[i]; 
                    onMO.onmouseover=this.change; 
                } 
            } 
        } 
    } 

    this.change=function() { this.checked=(this.checked) ? false:true; } 

    // By Peter Bailey, www.peterbailey.net 
    // Slight modifications by Ryan Parman, www.skyzyx.com 
    this.enableClickDrag=function(sameNameOnly) 
    { 
        // Abort if browser can't do script 
        if (document.all && !document.attachEvent) return true; 
        else if (!document.all && !document.addEventListener) return true; 
        //else if (document.all && !document.addEventListener) return true; // For retarded-ass Opera 7... 

        // Initialize Variables/properties 
        var f=eval('document.forms["'+this.nameOfForm+'"]'); 
        var dragObj=this; 
        this.checked=false; 
        this.mousedown=false; 
        this.validClick=false; 
        this.same=Boolean( sameNameOnly ); 

        // Attach Events 
        if ( document.attachEvent ) 
        { 
            f.attachEvent( "onmousedown", function() { downHandler( event.srcElement, dragObj ) } ); 
            f.attachEvent( "onmouseover", function() { overHandler( event.srcElement, dragObj ) } ); 
            document.attachEvent( "onmouseup", function() { upHandler( event.srcElement, dragObj ) } ); 
        } 
        else 
        { 
            f.addEventListener( "mousedown", function( e ) { downHandler( e.target, dragObj ) }, false ); 
            f.addEventListener( "mouseover", function( e ) { overHandler( e.target, dragObj ) }, false ); 
            document.addEventListener( "mouseup", function( e ) { upHandler( e.target, dragObj ) }, false ); 
        } 

        // Handler for form.onMouseDown event 
        function downHandler(elem, o) 
        { 
            if (elem.type=="checkbox") 
            { 
                o.validClick=true; 
                o.firstCB=elem; 
                o.mousedown=true; 
                o.checked=!elem.checked 
                if (o.same) o.name=elem.name; 
            } 
        } 

        // Handler for document.onMouseUp event 
        function upHandler(elem, o) 
        { 
            if (o.validClick && o.firstCB) 
            { 
                o.firstCB.checked=o.checked; 
                o.mousedown=false; 
                o.checked=!o.checked; 
                o.validClick=false; 
                if (elem===o.firstCB) elem.checked=o.checked; 
            } 
        } 

        // Hanlder for form.onMouseOver event 
        function overHandler(elem, o) 
        { 
            if (elem.type=="checkbox" && o.mousedown) 
            { 
                if (o.same && elem.name == o.name) elem.checked=o.checked; 
                else if (!o.same) elem.checked=o.checked; 
            } 
        } 
    } 
}