jQuery实现点击按钮弹出可关闭层的浮动层插件_jquery

function popWin(a){function n(){var a=k?k:document.body,b=a.scrollHeight>a.clientHeight?a.scrollHeight:a.clientHeight,c=a.scrollWidth>a.clientWidth?a.scrollWidth:a.clientWidth;$("#maskLayer").css({height:b,width:c})}var d,e,b=9e3,c=!1,f=$("#"+a),g=f.width(),h=f.height(),i=f.find(".tit"),j=f.find(".close"),k=document.documentElement,l=($(document).width()-f.width())/2,m=(k.clientHeight-f.height())/2;f.css({left:l,top:m,display:"block","z-index":b- -1}),i.mousedown(function(a){c=!0,d=a.pageX-parseInt(f.css("left")),e=a.pageY-parseInt(f.css("top")),f.css({"z-index":b- -1}).fadeTo(50,.5)}),i.mouseup(function(){c=!1,f.fadeTo("fast",1)}),$(document).mousemove(function(a){if(c){var b=a.pageX-d;0>=b&&(b=0),b=Math.min(k.clientWidth-g,b)-5;var i=a.pageY-e;0>=i&&(i=0),i=Math.min(k.clientHeight-h,i)-5,f.css({top:i,left:b})}}),j.live("click",function(){$(this).parent().parent().hide().siblings("#maskLayer").remove()}),$('').appendTo("body").css({background:"#000",opacity:".4",top:0,left:0,position:"absolute",zIndex:"8000"}),n(),$(window).bind("resize",function(){n()}),$(document).keydown(function(a){27==a.keyCode&&($("#maskLayer").remove(),f.hide())})}







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