人性化小技巧：(javascript)如何让用户自由控制html页面大段文字的行间距和背景颜色:示例:http://www.universecommerce.com/newtower/new.htm
行间距:<script> var hjj=22; </script><a href="javascript:;" onClick="hjj++;document.body.style.lineHeight=hjj+'px';">行间距+</a> <a href="javascript:;" onClick="hjj--;document.body.style.lineHeight=hjj+'px';">行间距-</a><br>背景色:在<style type="text/css">中如果定义了body {的背景颜色，可能导致无法鼠标获取颜色getColorTest()
<script> //获取颜色测试, 背景颜色 var isOpen = false; var vBlue = 0; function getColorTest() { var a,b,c,x,y; o = document.all('nouseIsGetColor'); if( null == o ) return; if( false == o.checked ) { if( isOpen ) { //document.bgColor = "#ffffff"; isOpen = false; } return; } document.body.background=""; x = event.x; y = event.y; // x = Math.round( 256 * x / (screen.availWidth-90) ); y = Math.round( 256 * y / (screen.availHeight-120) ); // a = x; // a = ( x - y/2 ); b = y; // b = ( y/2 ) ; c = vBlue; //c = ( 0.7 * y ); vBlue += 10 * Math.random(); a = a % 255; b = b % 255; c = c % 255; // //a = x % 255; b = y % 255; c = ( x+y ) % 255; // a = Math.round(a); b = Math.round(b); c = Math.round(c); if( null != document.bgColor ) document.bgColor = "rgb("+a+","+b+","+c+")"; window.status = 'r=' + a + ' g=' + b + ' b=' + c ; o = document.all('nouseColorTest'); if( null != o ) { o.value = document.bgColor; o.value = o.value.substr(1,o.value.length); isOpen = true; } } </script>
<body onMouseMove="javascript:getColorTest();">
自由改变背景颜色<input name="nouseIsGetColor" type="checkbox" value="checkbox" class="cb" title="鼠标随处移动，颜色确定后按空格键生效">背景颜色值<input name="nouseColorTest" type="text" size="8" maxlength="250" onBlur="if(this.value!='') document.bgColor=this.value;" title="可以人工输入值，焦点离开后，颜色值生效">按空格确定 <a href="javascript:;" onClick="location.reload();">还原</a>
