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I got this code for drag and drop and object. I'm not familiar with this sort of syntax like start: function(e).. I tried to edit the code with

function start(e){} this gives me error. I need to use substring method on name obj, I cant use it. Could anyone please tell me is it really javascript? Please let me know how I would apply substring on name variable.


var Drag = {

obj : null,
name: null,
init : function(o, name, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper)
{
	this.name=name;

	o.onmousedown	= Drag.start;

	o.hmode			= bSwapHorzRef ? false : true ;
	o.vmode			= bSwapVertRef ? false : true ;

	o.root = oRoot && oRoot != null ? oRoot : o ;

	if (o.hmode  && isNaN(parseInt(o.root.style.left  ))) o.root.style.left   = "0px";
	if (o.vmode  && isNaN(parseInt(o.root.style.top   ))) o.root.style.top    = "0px";
	if (!o.hmode && isNaN(parseInt(o.root.style.right ))) o.root.style.right  = "0px";
	if (!o.vmode && isNaN(parseInt(o.root.style.bottom))) o.root.style.bottom = "0px";

	o.minX	= typeof minX != 'undefined' ? minX : null;
	o.minY	= typeof minY != 'undefined' ? minY : null;
	o.maxX	= typeof maxX != 'undefined' ? maxX : null;
	o.maxY	= typeof maxY != 'undefined' ? maxY : null;

	o.xMapper = fXMapper ? fXMapper : null;
	o.yMapper = fYMapper ? fYMapper : null;

	o.root.onDragStart	= new Function();
	o.root.onDragEnd	= new Function();
	o.root.onDrag		= new Function();
},

start : function(e)
{
	var o = Drag.obj = this;
	e = Drag.fixE(e);
	var y = parseInt(o.vmode ? o.root.style.top  : o.root.style.bottom);
	var x = parseInt(o.hmode ? o.root.style.left : o.root.style.right );
	o.root.onDragStart(x, y);

	o.lastMouseX	= e.clientX;
	o.lastMouseY	= e.clientY;

	if (o.hmode) {
		if (o.minX != null)	o.minMouseX	= e.clientX - x + o.minX;
		if (o.maxX != null)	o.maxMouseX	= o.minMouseX + o.maxX - o.minX;
	} else {
		if (o.minX != null) o.maxMouseX = -o.minX + e.clientX + x;
		if (o.maxX != null) o.minMouseX = -o.maxX + e.clientX + x;
	}

	if (o.vmode) {
		if (o.minY != null)	o.minMouseY	= e.clientY - y + o.minY;
		if (o.maxY != null)	o.maxMouseY	= o.minMouseY + o.maxY - o.minY;
	} else {
		if (o.minY != null) o.maxMouseY = -o.minY + e.clientY + y;
		if (o.maxY != null) o.minMouseY = -o.maxY + e.clientY + y;
	}

	document.onmousemove	= Drag.drag;
	document.onmouseup		= Drag.end;

	return false;
},

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It seems to be a javascript object,

 

Initiated like this

Drag.init(o, name, oRoot, minX, maxX, minY, maxY, bSwapHorzRef, bSwapVertRef, fXMapper, fYMapper);

 

no idea what the variables mean since there are no comments in the code.. but i bet you can figure it out, or if you give us more information we might be able to help you.

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