简单的JS分页代码

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<script language=javascript>function WritePager(pageIndex,pageCount,pageName,ext){if(pageCount>1){var pagelen=7;var startPage=pageIndex-3;if(startPage<0) startPage=0;var endpage=pagelen+startPage;if(endpage>pageCount)endpage=pageCount;startPage=endpage-7;if(startPage<0) startPage=0;if(pageIndex>1){document.write("<a href=\""+pageName+"."+ext+"\">首页</a> ");   document.write(" <a href=\""+pageName+"_"+(pageIndex-1)+"."+ext+"\">上一页</a> ");}else if(pageIndex==1){document.write("<a href=\""+pageName+"."+ext+"\">首页</a> ");document.write(" <a href=\""+pageName+"."+ext+"\">上一页</a> ");}else{document.write(" 首页</a> ");document.write(" 上一页 ");}for(var i=startPage;i<endpage;i++){if(i==pageIndex){document.write(" <font color=red>"+(i+1)+"<\/font> ");}else if(i==0){document.write(" <a href=\""+pageName+"."+ext+"\">"+(i+1)+"</a> ");}else{document.write(" <a href=\""+pageName+"_"+i+"."+ext+"\">"+(i+1)+"</a> ");}}if(pageIndex<pageCount-1){document.write(" <a href=\""+pageName+"_"+(pageIndex+1)+"."+ext+"\">下一页</a> ");document.write("<a class='pagebar' href=\"" + pageName + "_" + (pageCount-1) + "." + ext + "\">尾页</a>");}else{document.write(" 下一页 ");document.write(" 尾页</a>");}}}WritePager(0,100,"index","html");</script>