var offImg1 = new Image();
offImg1.src = 'b.gif';
var onImg1 = new Image();
onImg1.src = 'b2.gif';

function swapImg(imgId, imgFrom) {
	if (document.images)
		document.images[imgId].src = imgFrom.src;
}

var exe_w = null;

function exe_wOpen() {
	if (exe_w) exe_w.close();
	exe_w = window.open('ework_prof.htm', 'exe_w', 'menubar=0,resizable=1,scrollbars=1,width=600,height=400,left=0,top=0');
	exe_w.focus();
}