comeontom

    // 离开页面弹出提示代码: 绑定beforeunload事件
        addBeforeunload: function() {
        	this.delBeforeunload();
        	$(window).bind('beforeunload',function(e){
        		var confirmationMessage = '确定离开此页吗？本页不需要刷新或后退';
        		(e || window.event).returnValue = confirmationMessage;
        		return confirmationMessage;
        	});
        },
        //离开页面弹出提示代码: 解除绑定

comeontom

function select(element) {
    var selectedText;
    var isReadOnly = element.hasAttribute('readonly');
    if (!isReadOnly) {
        element.setAttribute('readonly', '');
    }
    element.select();
    element.setSelectionRange(0, element.value.length);
    if (!isReadOnly) {
        element.removeAttribute('readonly');