function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}



function InitMainPage() {
}




function dynamicSelect(id1, id2) {
	if (document.getElementById && document.getElementsByTagName) {
		var sel1 = document.getElementById(id1);
		var sel2 = document.getElementById(id2);
		var clone = sel2.cloneNode(true);
		var clonedOptions = clone.getElementsByTagName("option");
		refreshDynamicSelectOptions(sel1, sel2, clonedOptions);
		sel1.onchange = function() {
			refreshDynamicSelectOptions(sel1, sel2, clonedOptions);
		}
	}
}

function refreshDynamicSelectOptions(sel1, sel2, clonedOptions) {
	while (sel2.options.length) {
		sel2.remove(0);
	}
	var pattern1 = /( |^)(select)( |$)/;
	var pattern2 = new RegExp("( |^)(" + sel1.options[sel1.selectedIndex].value + ")( |$)");
	for (var i = 0; i < clonedOptions.length; i++) {
		if (clonedOptions[i].className.match(pattern1) ||
		clonedOptions[i].className.match(pattern2)) {
			sel2.appendChild(clonedOptions[i].cloneNode(true));
		}
	}
}