jiayuanCo的博客

测试数字 function myFunction() { try { var x=document.getElementById("demo").value; if(x=="") throw "值为空"; if(isNaN(x)) throw "不是数字"; if(x>10) throw "太大"; if(x<5) throw "太小"; } catch(e

ul { list-style-type:none; margin:0; padding:0; } a:link,a:visited { display:block; font-weight:bold; color:#FFFFFF; background-color:#bebebe; width:120px; text-align:center; padding:4px; text-decorat

firstpage div#container{width:800px} div#drinks{width:500px;height:400px;background-image:url('Desert.jpg');float:left;} div#webpages{width:300px;height:400px;float:left;} div#forms{float:left;b