2008优秀毕业设计(购物网站)

<SCRIPT LANGUAGE="JavaScript"> function checks() { if(checkspace(document.userinfo.username.value)) { document.userinfo.username.focus(); alert("用户名不能为空，请重新输入！"); return false; } if(checkspace(document.userinfo.username.value) || document.userinfo.username.value.length < 4) { document.userinfo.username.focus(); alert("用户名长度不能小于4，请重新输入！"); return false; } if(checkspace(document.userinfo.userpassword.value) ) { document.userinfo.userpassword.focus(); alert("密码不能为空，请重新输入！"); return false; } if(checkspace(document.userinfo.userpassword.value) || document.userinfo.userpassword.value.length < 6) { document.userinfo.userpassword.focus(); alert("密码长度不能小于6，请重新输入！"); return false; } if(document.userinfo.userpassword.value != document.userinfo.userpassword1.value) { document.userinfo.userpassword.focus(); document.userinfo.userpassword.value = ''; document.userinfo.userpassword1.value = ''; alert("两次输入的密码不同，请重新输入！"); return false; } if(document.userinfo.useremail.value.length!=0) { if (document.userinfo.useremail.value.charAt(0)=="." || document.userinfo.useremail.value.charAt(0)=="@"|| document.userinfo.useremail.value.indexOf('@', 0) == -1 || document.userinfo.useremail.value.indexOf('.', 0) == -1 || document.userinfo.useremail.value.lastIndexOf("@")==document.userinfo.useremail.value.length-1 || document.userinfo.useremail.value.lastIndexOf(".")==document.userinfo.useremail.value.length-1) { alert("Email地址格式不正确！"); document.userinfo.useremail.focus(); return false; } } else { alert("Email不能为空！"); document.userinfo.useremail.focus(); return false; } if(checkspace(document.userinfo.name.value)) { document.userinfo.name.focus(); alert("真实姓名不能为空，请重新输入！"); return false; } if(checkspace(document.userinfo.question.value)) { document.userinfo.question.focus(); alert("密码提问不能为空，请重新输入！"); return false; } if(checkspace(document.userinfo.answer.value)) { document.userinfo.answer.focus(); alert("密码答案能为空，请重新输入！"); return false; } { userinfo.submit(); } } function regInput(obj, reg, inputStr) { var docSel = document.selection.createRange() if (docSel.parentElement().tagName != "INPUT") return false oSel = docSel.duplicate() oSel.text = "" var srcRange = obj.createTextRange() oSel.setEndPoint("StartToStart", srcRange) var str = oSel.text + inputStr + srcRange.text.substr(oSel.text.length) return reg.test(str) } function checkspace(checkstr) { var str = ''; for(i = 0; i < checkstr.length; i++) { str = str + ' '; } return (str == checkstr); } function openwin(){ if (userinfo.username.value==""){ document.userinfo.username.focus(); alert("用户名不能为空，请重新输入！"); return false; } var str="checkreg.asp?username="+userinfo.username.value; window.showModalDialog(str,"","dialogWidth=300px;dialogHeight=50px;Status=no;Help=no;Scrollbars=no"); } </script>