页面下雪效果的实现代码

dn001 2009-06-21 08:19:59

<head> <STYLE> th{background-color:#999999;} .trOdd{background-color:#FFFFFF;} .trEven{background-color:#CCCCCC;} </STYLE> <SCRIPT language="javascript"> /** * 自动扫描表格，描绘奇偶行的颜色 * oTable：目标表格 oddClass：奇数行的css样式 evenClass：偶数行的css样式 */ function setRowColor(oTable,oddClass,evenClass) { resetTableColor(oTable); for(var i=1; i<oTable.rows.length; i++) { if(i % 2 == 0) oTable.rows[i].className = evenClass; else oTable.rows[i].className = oddClass; } } /** * added by LxcJie 2004.6.28 * 自动扫描表格，描绘奇偶列的颜色 * oTable：目标表格 oddClass：奇数列的css样式 evenClass：偶数列的css样式 */ //more javascript from http://www.knowsky.com function setColColor(oTable,oddClass,evenClass) { resetTableColor(oTable); for(var i=1; i<oTable.rows.length; i++) { for(var j=0; j<oTable.rows[i].cells.length; j++) { if(j % 2 == 0) oTable.rows[i].cells[j].className = evenClass; else oTable.rows[i].cells[j].className = oddClass; } } } //清空所有tr和td的样式 function resetTableColor(oTable) { for(var i=1; i<oTable.rows.length; i++) { oTable.rows[i].className = ""; for(var j=0; j<oTable.rows[i].cells.length; j++) oTable.rows[i].cells[j].className = ""; } } </SCRIPT> <SCRIPT language="javascript"> window.changeTag = true; function init() { setRowColor(document.all.tableRow,'trOdd','trEven'); setColColor(document.all.tableCol,'trOdd','trEven'); } function change() { if(changeTag) { setRowColor(document.all.tableCol,'trOdd','trEven'); setColColor(document.all.tableRow,'trOdd','trEven'); changeTag = false; } else { setRowColor(document.all.tableRow,'trOdd','trEven'); setColColor(document.all.tableCol,'trOdd','trEven'); changeTag = true; } } </SCRIPT> </head>  <body onLoad="init()">  <TABLE width="70%" border="1" cellpadding="0" cellspacing="1" bordercolor="#000000" id="tableRow"> <TR> <TH scope="col">col1</TH> <TH scope="col">col2</TH> <TH scope="col">col3</TH> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> </TR> </TABLE> <P> <TABLE width="70%" border="1" cellpadding="0" cellspacing="1" bordercolor="#000000" id="tableCol"> <TR> <TH width="25%" scope="col">col1</TH> <TH width="25%" scope="col">col2</TH> <TH width="25%" scope="col">col3</TH> <TH width="25%" scope="col">col4</TH> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> <TD> </TD> </TR> <TR> <TD> </TD> <TD> </TD> <TD> </TD> <TD> </TD> </TR> </TABLE><p> <input type="button" value=" 交换 " onClick="change()" style="border:1px solid black; "> </body>