function clearText(field){

    if (field.defaultValue == field.value) field.value = '';
    else if (field.value == '') field.value = field.defaultValue;

}


function checkUncheck(theElement) {
	var theForm = theElement.form, z = 0;
	for(z=0; z<theForm.length;z++){
		if(theForm[z].type == 'checkbox' && theForm[z].name != 'checkall'){
			theForm[z].checked = theElement.checked;
		}
	}
}