xtree.js

为交课程设计

scores = new Array(20);
var numTotal=0;
NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
ver4 = (NS4 || IE4) ? 1 : 0;
if (ver4) {
    with (document) {
            write("<STYLE TYPE='text/css'>");
                    if (NS4) {
                                write(".parent {position:absolute; visibility:visible}");
                                write(".child {position:absolute; visibility:visible}");
                                write(".regular {position:absolute; visibility:visible}")
                    }else {
                    		write(".child {display:none}")
                    }
                    write("</STYLE>");
     }
}
function getIndex(el) {
    ind = null;
    for (i=0; i<document.layers.length; i++) {
            whichEl = document.layers[i];
            if (whichEl.id == el) {
                    ind = i;
                    break;
            }
     }
     return ind;
}
function arrange() {
	nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;
	for (i=firstInd+1; i<document.layers.length; i++) {
	        whichEl = document.layers[i];
	        if (whichEl.visibility != "hide") {
	               whichEl.pageY = nextY;
	               nextY += whichEl.document.height;
	        }
	}
}
function initIt(){
	if (!ver4) return;
	if (NS4) {
		for (i=0; i<document.layers.length; i++) {
		     whichEl = document.layers[i];
		     if (whichEl.id.indexOf("Child") != -1)
		     	whichEl.visibility = "hide";
		     }
		arrange();
	}else {
	    divColl = document.all.tags("DIV");
	    for (i=0; i<divColl.length; i++) {
	         whichEl = divColl(i);
	         if (whichEl.className == "child") whichEl.style.display = "none";
	    }
	}
}
function expandIt(el) {
	if (!ver4) return;
	if (IE4) {
	    whichEl1 = eval(el + "Child");
	    for(i=1;i<=numTotal;i++){
	    	whichEl = eval(scores[i] + "Child");
	    	if(whichEl!=whichEl1) {
	    		whichEl.style.display = "none";
	    	}
	    }
	    whichEl1 = eval(el + "Child");
	    if (whichEl1.style.display == "none") {
	          whichEl1.style.display = "block";
	    } else {
	           whichEl1.style.display = "none";
	    }
	}else {
	    whichEl = eval("document." + el + "Child");
	    for(i=1;i<=numTotal;i++){
	    	whichEl = eval("document." + scores[i] + "Child");
	    	if(whichEl!=whichEl1) {
	    		whichEl.visibility = "hide";
	    	}
	    }
	    if (whichEl.visibility == "hide") {
	        whichEl.visibility = "show";
	    }else {
	        whichEl.visibility = "hide";
	    }
	    arrange();
	}
}
onload = initIt;