jquery使用技巧(2)

13. 替换元素

$(document).ready(function() {
$('#id').replaceWith('
<DIV>I have been replaced</DIV>

');
});

14. jQuery延时加载功能

$(document).ready(function() {
window.setTimeout(function() {
// do something
}, 1000);
});

15. 移除单词功能

$(document).ready(function() {
var el = $('#id');
el.html(el.html().replace(/word/ig, ""));
});

16. 验证元素是否存在于jquery对象集合中

$(document).ready(function() {
if ($('#id').length) {
// do something
}
});

17. 使整个DIV可点击

$(document).ready(function() {
$("div").click(function(){
//get the url from href attribute and launch the url
window.location=$(this).find("a").attr("href"); return false;
});
// how to use
<DIV><A href="index.html">home</A></DIV>

});

18. ID与Class之间转换.

$(document).ready(function() {
function checkWindowSize() {
if ( $(window).width() > 1200 ) {
$('body').addClass('large');
}
else {
$('body').removeClass('large');
}
}
$(window).resize(checkWindowSize);
});

19. 克隆对象

$(document).ready(function() {
var cloned = $('#id').clone();
// how to use
<DIV id=id></DIV>

});

20. 使元素居屏幕中间位置

$(document).ready(function() {
jQuery.fn.center = function () {
this.css("position","absolute");
this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px");
this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px");
return this;
}
$("#id").center();
});

21. 写自己的选择器

$(document).ready(function() {
$.extend($.expr[':'], {
moreThen1000px: function(a) {
return $(a).width() > 1000;
}
});
$('.box:moreThen1000px').click(function() {
// creating a simple js alert box
alert('The element that you have clicked is over 1000 pixels wide');
});
});

22. 统计元素个数

$(document).ready(function() {
$("p").size();
});

23. 使用自己的 Bullets

$(document).ready(function() {
$("ul").addClass("Replaced");
$("ul > li").prepend("‒ ");
// how to use
ul.Replaced { list-style : none; }
});

24. 引用Google主机上的Jquery类库

//Example 1
<SCRIPT src="http://www.google.com/jsapi"></SCRIPT>
<SCRIPT type=text/javascript>
google.load("jquery", "1.2.6");
google.setOnLoadCallback(function() {
// do something
});
</SCRIPT><SCRIPT type=text/javascript src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></SCRIPT>

// Example 2:(the best and fastest way)
<SCRIPT type=text/javascript src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></SCRIPT>

25. 禁用Jquery（动画）效果

$(document).ready(function() {
jQuery.fx.off = true;
});

26. 与其他Javascript类库冲突解决方案

$(document).ready(function() {
var $jq = jQuery.noConflict();
$jq('#id').show();
});