Effect.CssEffect=Class.create(Effect.Base,{initialize:function(css){this.css=css;this.cssfile=null;var options=Object.extend({property:'',start:0,end:0},arguments[1]||{});this.start(options)},setup:function(){this.value=parseFloat(this.options.start||'0')},update:function(position){if(this.options.start!=this.options.end){var expression=this.options.property+':'+(((this.options.end-this.options.start)*position)+this.options.start).round()+'px';this.setCss(expression)}},setCss:function(expression){if(document.createStyleSheet){var css=document.styleSheets;var pseudocss=null;for(var i=0;i<css.length;i++){if(css[i].title=='pseudocss'){pseudocss=css[i]}}if(pseudocss==null){pseudocss=document.createStyleSheet();pseudocss.title='pseudocss'}pseudocss.addRule(this.css,expression)}else{if($('pseudocss')==null){var pseudocss=document.createElement("style");pseudocss.type='text/css';pseudocss.title='pseudocss';pseudocss.id='pseudocss';document.getElementsByTagName("body")[0].appendChild(pseudocss)}$('pseudocss').innerHTML=$('pseudocss').innerHTML+' '+this.css+'{'+expression+'}'}}});