/* -- COMPARE PASSWORD STRINGS -- */
function compare_passwords() {
	if (document.user.pw1.value != document.user.pw2.value) {
		alert("Passwords do not match!");
		document.user.pw1.value = "";
		document.user.pw2.value = "";
		document.user.pw1.focus();
		return false;
	}
	else {
		return true;
	}
}

/* -- GENERIC FUNCTION FOR CONFIRMING DELETE OPERATIONS ON ANY TYPE OF DATA -- */
function confirm_delete(element, elementname) {
	if(confirm('Are you sure you want to delete ' + element + " " + elementname + "?")) {
		deleteurl = "delete" + element + ".php?uid=" + elementID;
		document.location = deleteurl;
	}
	else {
		return false;
	}
}

/* -- FOR ALTERNATING TABLE ROWS -- */
// this function is need to work around a bug in IE related to element attributes
function hasClass(obj) {
	var result = false;
	if (obj.getAttributeNode("class") != null) {
		result = obj.getAttributeNode("class").value;
	}
	return result;
}   

function stripe(id) {
	// the flag we'll use to keep track of whether the current row is odd or even
	var even = false;

	// if arguments are provided to specify the colours of the even & odd rows, then use the them; otherwise use the following defaults:
	var evenColor = arguments[1] ? arguments[1] : "#ddccce";
//	var evenColor = arguments[1] ? arguments[1] : "#DDBBBC";
//	var oddColor = arguments[2] ? arguments[2] : "#fff";
	// obtain a reference to the desired table if no such table exists, abort
	var table = document.getElementById(id);
	if (! table) 
		{ return; }
	// by definition, tables can have more than one tbody element, so we'll have to get the list of child <tbody>s 
	var tbodies = table.getElementsByTagName("tbody");
	// and iterate through them...
	for (var h = 0; h < tbodies.length; h++) {
		// find all the &lt;tr&gt; elements... 
		var trs = tbodies[h].getElementsByTagName("tr");
		// ... and iterate through them
		for (var i = 0; i < trs.length; i++) {
			// avoid rows that have a class attribute or backgroundColor style
			if (!hasClass(trs[i]) && ! trs[i].style.backgroundColor) {
				// get all the cells in this row...
				var tds = trs[i].getElementsByTagName("td");
				// and iterate through them...
				for (var j = 0; j < tds.length; j++) {
					var mytd = tds[j];
					// avoid cells that have a class attribute or backgroundColor style
					// svs added '&& even' so that other rows are 'clear'
					if (! hasClass(mytd) && ! mytd.style.backgroundColor && even) {
						mytd.style.backgroundColor = even ? evenColor : oddColor;
					}
				}
			}
			// flip from odd to even, or vice-versa
			even =  ! even;
		}
	}
}