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// Copyright 2001 by Mike Hall http://www.brainjar.com
function Browser() { var ua, s, i; this.isIE = false; this.isNS = false; this.version = null; ua = navigator.userAgent; s = "MSIE"; if ((i = ua.indexOf(s)) >= 0) { this.isIE = true; this.version = parseFloat(ua.substr(i + s.length)); return; } s = "Netscape6/"; if ((i = ua.indexOf(s)) >= 0) { this.isNS = true; this.version = parseFloat(ua.substr(i + s.length)); return; } s = "Gecko"; if ((i = ua.indexOf(s)) >= 0) { this.isNS = true; this.version = 6.1; return; }} var browser = new Browser(); var dragObj = new Object(); dragObj.zIndex = 0; function dragStart(event, id) { var el; var x, y; if (id) dragObj.elNode = document.getElementById(id); else { if (browser.isIE) dragObj.elNode = window.event.srcElement; if (browser.isNS) dragObj.elNode = event.target; if (dragObj.elNode.nodeType == 3) dragObj.elNode = dragObj.elNode.parentNode; } if (browser.isIE) { x = window.event.clientX + document.documentElement.scrollLeft + document.body.scrollLeft; y = window.event.clientY + document.documentElement.scrollTop + document.body.scrollTop; } if (browser.isNS) { x = event.clientX + window.scrollX; y = event.clientY + window.scrollY; } dragObj.cursorStartX = x; dragObj.cursorStartY = y; dragObj.elStartLeft  = parseInt(dragObj.elNode.style.left, 10); dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10); if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0; if (isNaN(dragObj.elStartTop)) dragObj.elStartTop  = 0; dragObj.elNode.style.zIndex = ++dragObj.zIndex; if (browser.isIE) { document.attachEvent("onmousemove", dragGo); document.attachEvent("onmouseup", dragStop); window.event.cancelBubble = true; window.event.returnValue = false; } if (browser.isNS) { document.addEventListener("mousemove", dragGo, true); document.addEventListener("mouseup", dragStop, true); event.preventDefault(); }} function dragGo(event) { var x, y; if (browser.isIE) { x = window.event.clientX + document.documentElement.scrollLeft + document.body.scrollLeft; y = window.event.clientY + document.documentElement.scrollTop + document.body.scrollTop; } if (browser.isNS) { x = event.clientX + window.scrollX; y = event.clientY + window.scrollY; } dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px"; dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px"; if (browser.isIE) { window.event.cancelBubble = true; window.event.returnValue = false; } if (browser.isNS) event.preventDefault(); } function dragStop(event) { if (browser.isIE) { document.detachEvent("onmousemove", dragGo); document.detachEvent("onmouseup",   dragStop); } if (browser.isNS) { document.removeEventListener("mousemove", dragGo, true); document.removeEventListener("mouseup", dragStop, true); }}
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