clearedFields = new Array();
	
function e3_clearInputField(id) {
		var found = false;
		for(i=0; i < clearedFields.length; i++) {
			if(clearedFields[i] == id) {
				found = true;
			}
		}
		if(!found) {
			document.getElementById(id).value = '';
			clearedFields.push(id);
		}
	}