var arrayHeaders  = ["tab-header1","tab-header2"];
var arrayContents = ["tab-content1","tab-content2"]; 

window.onload = function(){
	
	var bol = true;
	for (var i = 0; i < arrayHeaders.length; i++) {
		if (document.getElementById(arrayHeaders[i]) == undefined) {
			bol = false;
		}
	}

	if (bol) {
		var tabRelationship = new ylib.widget.Tabs(arrayHeaders, arrayContents, 0);
	}
}