}
return constr;
}
function show(arr,now_page){
var sum=arr.length;
var page_size=3;
var page_num=Math.ceil(sum/page_size);
var start=(now_page-1)*page_size+1;
var page_str='';
for(var i=1;i<=page_num;i++){
var stylei=i;
if(i==now_page){ stylei="<span style='background:black;color:white;margin:0'>"+i+"</span>";}
page_str+='<span onclick="show(arr,'+i+')">'+stylei+'</span>';
}
$('#page').html(page_str);
var constr=pageCon(arr,start,page_size);
$('#con').html(constr);
}
show(arr,2);
</script>
</body>
</html>
javascript类型转换示例
scriptvari="123abc";i=parseInt(i);//字符串转整形alert(i+","+typeof(i));//输出：123，numberi="12.3abc";i=parseFloat(i);//字符串转浮点型alert(i+","+typeof(i));//输出：12.3，number(
javascript闭包入门示例
1.functionsay667(){varnum=666;varsayAlert=function(){alert(num);}num++;returnsayAlert;}varsayAlert=say667();sayAlert();2.functionsetUpSomeGlobals(){varnum=666;gAlertNumber=function(){alert(num);}gIncr
js图片预加载示例
js图片预加载简单示例functionloadImage(url,callback){if(url!='null'){varimg=newImage();img.src=url;if(img.complete){callback(img);}else{img.onload=function(){img.onload=null;callback(img);}}}}
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