探讨：js与php中三等号（===）和双等号（==）的区别

<script><li>var priceOfApple = "3元"; // 苹果的价格<li>var priceOfBanana = "3.5元"; // 香蕉的价格<li>priceOfApple = parseInt( priceOfApple ); // 解析苹果的价格<li>var priceOfBanana2 = parseInt( priceOfBanana ); // 解析香蕉的价格<li>if( ( priceOfApple===3 ) && ( priceOfBanana2 === 3 ) // 检查解析是否成功<li>&& ( parseFloat( priceOfBanana ) ===3.5 ) ) <li>{<li>alert( "苹果的价格:" + priceOfApple // 输出水果的价格<li>+ "\n香蕉的价格的整数部分:" + priceOfBanana2<li>+ "\n香蕉的价格:" + parseFloat( priceOfBanana ) );<li>}<li></script>